#include "apue.h"
#include <sys/stat.h>

void CheckFileType(struct stat buf) {
    const char *ptr;
    if (S_ISREG(buf.st_mode))
        ptr = "regular";
    else if (S_ISDIR(buf.st_mode))
        ptr = "directory";
    else if (S_ISCHR(buf.st_mode))
        ptr = "character special";
    else if (S_ISBLK(buf.st_mode))
        ptr = "block special";
    else if (S_ISFIFO(buf.st_mode))
        ptr = "fifo";
    else if (S_ISLNK(buf.st_mode))
        ptr = "symbolic link";
    else if (S_ISSOCK(buf.st_mode)) 
        ptr = "socker";
    else
        ptr = "** unknown mode **";
    printf("%s\n", ptr);
}

int main(int argc, char **argv) {
    int i;
    struct stat buf;

    if (argc < 2) {
        printf("Usage: ./app file1 [file2 ...]");
        return 0;
    }

    for (i = 1; i < argc; i++) {
        printf("%s: ", argv[i]);
        if (lstat(argv[i], &buf) < 0) {
            err_ret("lstat error");
            continue;
        }
        CheckFileType(buf);
    }

    return 0;
}



